CN205706166U - The pure electric transmission machanism of the many gears of double planet - Google Patents

Abstract

This utility model provides a kind of double planet pure electric transmission machanism of many gears, including small machine (EM1), big motor (EM2) and compound planetary gearing and double reduction gearing system, the power output of compound planetary gearing is transferred to wheel by double reduction gearing system through differential mechanism, and realizes the pure electric Drive Mode of three gears by controlling the first brake (B1), second brake (B2), the Guan Bi of the 3rd brake (B3) or open.The double planet of the present utility model pure electric transmission machanism of many gears, compact conformation, it is possible to achieve the pure electric Drive Mode of many gears.

Description

The pure electric transmission machanism of the many gears of double planet

Technical field

This utility model relates to a kind of automobile actuating device, particularly to a kind of double planet pure electric transmission of many gears Device.

Background technology

Along with country's new-energy automobile strategy development and the aggravation of environmental energy problem, the motorized of drive system is Through becoming the development trend of automobile dynamic system.The most more pure power driven system all have employed single motor and the biography of fixing gear Dynamic scheme, the i.e. motor reducing gear wd vehicle by fixed speed ratio.Such scheme relies on the range of speeds of motor self completely The rate request of foot car load, motor operating point depends entirely on traveling road conditions in the process of moving, it is impossible to be optimized.And how The actuating device making pure electric automobile meets the requirement of car load dynamic property, and has the system effectiveness of higher actuating device, Become the problem currently faced.

Utility model content

The many gears of double planet that this utility model aims to provide a kind of compact conformation, have a multiple-working mode are pure electronic Actuating device.Realized by below scheme:

A kind of double planet pure electric transmission machanism of many gears, including small machine EM1, big motor EM2, differential mechanism, also wraps Include the first single planetary row PG1, the second single planetary row PG2, the first brake B1, second brake B2, the 3rd brake B3, first Reduction gearing Z1, big retarding gear Z2 and little reduction gearing Z3, the first single planetary row PG1 includes the first sun gear S1, the first row Star-wheel P1, the first row carrier PC1 and the first external toothing R1, the second single planetary row PG2 includes the second sun gear S2, the second planetary gear P2, the second planet carrier PC2 and the second external toothing R2, the first single planetary row PG1 and the second single planetary row PG2 composition placed side by side are double Rows of planetary gear mechanism, the first row carrier PC1 of the first single planetary row and the second sun gear S2 of the second single planetary row are connected Constituting the first axle, the first external toothing R1 of the first single planetary row and the second planet carrier PC2 of the second single planetary row is connected to form Second axle, the second axle is as the output shaft of compound planetary gearing；Second axle is installed the first reduction gearing Z1, big retarding Gear Z2 is connected by rotating shaft with little reduction gearing Z3, and the first reduction gearing Z1 is meshed with big retarding gear Z2 formation first Level reducing gear train, little reduction gearing Z3 is meshed with the differential mechanism final gear Z4 being arranged on differential casing formation the Double-reduction gear system；Differential mechanism connects wheel by car load semiaxis, and the power of this actuating device is exported to car load by differential mechanism Semiaxis drives vehicle wheel rotation；First sun gear S1 of the first single planetary row is connected with the rotor of small machine EM1 by the 3rd axle, the Second external toothing R2 of two single planetary rows is connected with the rotor of big motor EM2 by the 4th axle；One end of first brake B1 is even Being connected on the 3rd axle, one end of second brake B2 is connected on the 4th axle, and one end of the 3rd brake B3 is connected to the first axle On, the other end of the first brake B1, second brake B2 and the 3rd brake B3 is each attached on gear box casing；4th axle For hollow structure inside, the first axle is through the inside of the 4th axle.

Further, described small machine, compound planetary gearing, big motor sequentially coaxially arrange placement, and the first order subtracts Speed gear train, second level reducing gear train and differential mechanism are arranged between small machine and compound planetary gearing, double planet The power output of gear mechanism is transferred to wheel by double reduction gearing system through differential mechanism.

According to prior art, single planetary row includes sun gear, planetary gear, planet carrier and external toothing, and planetary gear is installed On planet carrier, planetary gear is meshed with sun gear and external toothing respectively.Specifically in this utility model, the first single planetary row In PG1, the annexation between each parts is: the first row star-wheel P1 is arranged in the first row carrier PC1, and the first row star-wheel P1 divides It is not meshed with the first sun gear S1 and the first external toothing R1；In second single planetary row PG2, the annexation between each parts is: Second planetary gear P2 is arranged on the second planet carrier PC2, the second planetary gear P2 respectively with the second sun gear S2 and the second external toothing R2 is meshed.

The double planet of the present utility model pure electric transmission machanism of many gears, the dynamic coupling device used is for by first Single planetary row and the compound planetary gearing of the second single planetary row composition placed side by side, the first single planetary row and the second single file star Gear ratio between row arranges and is restricted the most each other, and structure design is more flexible, and the simple in construction of single planetary row is more favourable simultaneously In reducing gear transmission noises.The double planet of the present utility model pure electric transmission machanism of many gears, its power is by double planet The output of the output shaft of gear mechanism that is second axle is tied to differential mechanism via double reduction gearing and is transferred to wheel thus drives vehicle Travel.

The double planet of the present utility model pure electric transmission machanism of many gears, the first brake B1, second brake B2, Three brake B3 are common wet type shifting element.When closing second brake B2, small machine EM1 is operated alone, Ke Yishi The existing first pure electric Drive Mode of gear；When closing the 3rd brake B3, small machine EM1 and big motor EM2 simultaneously drives, can To realize the second pure electric Drive Mode of gear；When closing the first brake B1, big motor EM2 is operated alone, it is possible to achieve The pure electric Drive Mode in third gear position.When the first brake B1, second brake B2 and the 3rd brake B3 all open, Small machine EM1 and big motor EM2 exports positive-torque simultaneously and drives vehicle, when the rotating speed of small machine EM1, big motor EM2 is equal, Planet row each element rotating speed is the most equal, and it is too high without causing motor speed now can to obtain high speed.

The double planet of the present utility model pure electric transmission machanism of many gears, compact conformation, the pure of four gears can be realized Electric Drive Mode, according to the duty of road conditions switch motor, can meet speed and the torque demand of pure motorized motions, simultaneously Can realize, to big motor, the optimal control of two motors of small machine, there is the system effectiveness of higher actuating device.

Accompanying drawing explanation

Fig. 1: the overall structure schematic diagram of the pure electric transmission machanism of the many gears of double planet

The equivalent lever figure of the Fig. 2 (a): the first pure electric Drive Mode of gear

The equivalent lever figure of the Fig. 2 (b): the second pure electric Drive Mode of gear

Fig. 2 (c): the equivalent lever figure of the pure electric Drive Mode in third gear position

Fig. 2 (d): the equivalent lever figure of the pure electric Drive Mode in fourth gear position

Fig. 3: the equivalent lever figure of pure electronic reversing mode

Detailed description of the invention

Embodiment is simply to illustrate that a kind of implementation of the present utility model, not as to this utility model protection domain Restricted explanation.

Embodiment 1

A kind of double planet pure electric transmission machanism of many gears, as it is shown in figure 1, include small machine EM1, big motor EM2, difference Speed device the 1, first single planetary row PG1, the second single planetary row PG2, the first brake B1, second brake B2, the 3rd brake B3, First reduction gearing Z1, big retarding gear Z2 and little reduction gearing Z3, the first single planetary row PG1 include the first sun gear S1, One planetary gear P1, the first row carrier PC1 and the first external toothing R1, the first row star-wheel P1 is arranged in the first row carrier PC1, and first Planetary gear P1 respectively with the first sun gear S1 and the first external toothing R1 is meshed；Second single planetary row PG2 includes the second sun gear S2, the second planetary gear P2, the second planet carrier PC2 and the second external toothing R2, the second planetary gear P2 is arranged on the second planet carrier PC2 On, the second planetary gear P2 respectively with the second sun gear S2 and the second external toothing R2 is meshed；First single planetary row PG1 and second is single Planet row PG2 composition placed side by side compound planetary gearing 3, the first row carrier PC1 of the first single planetary row PG1 and the second list The second sun gear S2 of planet row PG2 is connected to form the first axle 4, the first external toothing R1 and second of the first single planetary row PG1 The second planet carrier PC2 of single planetary row PG2 is connected to form the second axle 5, defeated as compound planetary gearing 3 of the second axle 5 Shaft；Installing the first reduction gearing Z1 on the second axle 5, big retarding gear Z2 is connected by rotating shaft 6 with little reduction gearing Z3, First reduction gearing Z1 be meshed with big retarding gear Z2 formation first order reducing gear train 7, little reduction gearing Z3 be arranged on Differential mechanism final gear Z4 on differential mechanism 1 housing is meshed and forms second level reducing gear train 8；Differential mechanism 1 passes through car load Semiaxis 9 connects wheel 10, and the power of this actuating device is driven vehicle wheel rotation by differential mechanism output to car load semiaxis；First single file star The first sun gear S1 of row PG1 is connected with the rotor 12 of small machine EM1 by the 3rd axle 11, the second of the second single planetary row PG2 External toothing R2 is connected with the rotor 14 of big motor EM2 by the 4th axle 13；One end of first brake B1 is connected to the 3rd axle 11 On, one end of second brake B2 is connected on the 4th axle 13, and one end of the 3rd brake B3 is connected on the first axle 4, and first The other end of brake B1, second brake B2 and the 3rd brake B3 is each attached on gear box casing 2；4th axle 13 is interior Portion's hollow structure, the first axle 4 is through the inside of the 4th axle 13.Small machine EM1 in the present embodiment, compound planetary gearing 3, Big motor EM2 sequentially coaxially arranges placement, and first order reducing gear train 7, second level reducing gear train 8 and differential mechanism 1 are arranged in Between small machine EM1 and compound planetary gearing 3.

The dynamic coupling device that the present embodiment uses is for by the first single planetary row and the second single planetary row is placed side by side constitutes Compound planetary gearing, be delivered to reducing gear after the torque coupling of small machine EM1 and the input of two power sources of big motor EM2 Wheel, and it is delivered to wheel by differential mechanism through car load semiaxis.Vehicle during actual travel, each power source and each shifting element (clutch, brake) is applied in combination and will produce multiple different mode of operation.This actuating device can realize four kinds of Working moulds Formula, the respectively first gear pure electric Drive Mode EV-1, the second gear pure electric Drive Mode EV-2, third gear position are pure electronic Drive pattern EV-3, fourth gear position pure electric Drive Mode EV-4, the control planning between each mode of operation and shifting element is such as Shown in table 1, wherein represent open mode, ● represent closure state.

Control planning between each mode of operation of table 1 actuating device and shifting element

When vehicle low speed is started to walk, when second brake B2 closes, use small machine EM1 that vehicle is operated alone, this mould Formula is defined as the first gear pure electric Drive Mode EV-1, and this pattern is low-speed big output mode, and the first gear is pure electronic Shown in equivalent lever figure such as Fig. 2 (a) of drive pattern, T in figure_EM1Represent the moment of torsion of small machine EM1, T_LRepresent and be delivered to second Vehicle travel resistance on axle, in figure, arrow represents the moment of torsion on each axle, upwards represents positive-torque, represents downwards negative torque.Should The gear ratio of pattern underdrive device i.e. small machine EM1 to the gear ratio of vehicle wheel side is:

$i_{EV-1\_EM1}=\frac{-i_1+1+\left(-1/i_2\right)}{-1/i_2}*i_{FD}$

Wherein, i_EV-1It is the gear ratio of the first gear pure electric Drive Mode underdrive device, i₁It it is the first single planetary row The gear ratio (ratio of the numerical value number of teeth equal to the first external toothing R1 and the first sun gear S1, numerical value is negative) of PG1, i₂It it is the second list The gear ratio (ratio of the numerical value number of teeth equal to the second external toothing R2 and the second sun gear S2, numerical value is negative) of planet row PG2, i_FDFor The speed reducing ratio that double reduction gearing is total.Such as select gear ratio and base ratio that planetary design is conventional, it may be assumed that the first single file The gear ratio i of star row PG1₁=-2.6, the gear ratio i of the second single planetary row PG2₂=-1.6, the speed reducing ratio that double reduction gearing is total i_FD=4, data are substituted in above-mentioned formula the gear ratio i being calculated the first gear electric-only mode underdrive device_EV-1For 28, i.e. when small machine output moment of torsion is 100Nm, wheel will obtain the driving torque of 2800Nm.

When the 3rd brake B3 Guan Bi, using small machine EM1 and big motor EM2 to simultaneously drive, small machine EM1 bears rotating speed Output negative torque, big motor EM2 positive rotating speed output positive-torque, this pattern definition is the second gear pure electric Drive Mode EV-2, Shown in equivalent lever figure such as Fig. 2 (b) of second gear electric-only mode, T in figure_EM1Represent the moment of torsion of small machine EM1, T_EM2Represent The moment of torsion of big motor EM2, T_LRepresenting the vehicle travel resistance being delivered on the second axle, in figure, arrow represents the moment of torsion on each axle, Upwards represent positive-torque, represent downwards negative torque.Under this gear, small machine EM1 and big motor EM2 is to the gear ratio difference on wheel limit For:

i_{EV-2_EM1}=-i₁*i_FD

$i_{EV-2\_EM2}=(\frac{-1}{i_2}+1)*i_{FD}$

Wherein, i_{EV-2_EM1}It is the gear ratio of small machine EM1, i under the second pure electric Drive Mode of gear_{EV-2_EM2}It is second The gear ratio of big motor EM2, i under the pure electric Drive Mode of gear₁It is that (numerical value is equal to for the gear ratio of the first single planetary row PG1 The ratio of the number of teeth of one external toothing R1 and the first sun gear S1, numerical value is negative), i₂It is the gear ratio (numerical value of the second single planetary row PG2 Equal to the second external toothing R2 and the ratio of the number of teeth of the second sun gear S2, numerical value is negative), i_FDFor the deceleration that double reduction gearing is total Ratio.

When the first brake B1 Guan Bi, using big motor EM2 to be operated alone, this pattern definition is that third gear position is pure electronic Drive pattern EV-3, this pattern can obtain higher speed.Equivalent lever figure such as Fig. 2 of the pure electric Drive Mode in third gear position Shown in (c), T in figure_EM2Represent the moment of torsion of big motor EM2, T_LRepresent the vehicle travel resistance being delivered on the second axle, arrow in figure Head represents the moment of torsion on each axle, upwards represents positive-torque, represents downwards negative torque.The gear ratio of this gear underdrive device, i.e. Big motor EM2 to the gear ratio on wheel limit is:

$i_{EV-3\_EM2}=\frac{-i_1+1+\frac{-1}{i_2}}{-i_1+1}*i_{FD}$

Wherein, i_{EV-3_EM2}For the gear ratio of third gear position pure electric Drive Mode underdrive device, i₁It it is the first single file star The gear ratio (ratio of the numerical value number of teeth equal to the first external toothing R1 and the first sun gear S1, numerical value is negative) of row PG1, i₂It is second The gear ratio (ratio of the numerical value number of teeth equal to the second external toothing R2 and the second sun gear S2, numerical value is negative) of single planetary row PG2, i_FD For the speed reducing ratio that double reduction gearing is total.

Along with speed increases further, under above-mentioned each gear small machine EM1, big two motors of motor EM2 rotating speed all The most too high, now the first brake B1, second brake B2 and the 3rd all open modes of brake B3, use little electricity Machine EM1 and big motor EM2 simultaneously drives, and this pattern definition is fourth gear position pure electric drive mode EV-4, and fourth gear position is pure electronic Shown in equivalent lever figure such as Fig. 2 (d) of drive pattern, T in figure_EM1Represent the moment of torsion of small machine EM1, T_EM2Represent big motor EM2 Moment of torsion, T_LRepresenting the vehicle travel resistance being delivered on the second axle, in figure, arrow represents the moment of torsion on each axle, is just upwards representing Moment of torsion, represents downwards negative torque.This pattern lower whorl limit obtains driving torque:

Twheel_EV-4=(T_EM1+T_EM2)*i_FD

Wherein, Twheel_EV-4Driving torque, T is obtained for pure electric Drive Mode lower whorl limit, fourth gear position_EM1For small machine The moment of torsion of EM1, T_EM2For the moment of torsion of big motor EM2, i_FDFor the speed reducing ratio that double reduction gearing is total.When small machine EM1, big motor When EM2 rotating speed is equal, each planetary gear elements rotating speed is the most equal, and now vehicle can obtain max. speed without causing small machine EM1, two motor self rotating speeds of big motor EM2 are too high.

When pure electronic reversing, use the first gear pure electric Drive Mode EV-1, control small machine EM1 and bear rotating speed output Negative torque, the equivalent lever figure of pure electronic reversing mode is as it is shown on figure 3, T in figure_EM1Represent the moment of torsion of small machine EM1, T_LRepresent Being delivered to the vehicle travel resistance on the second axle, in figure, arrow represents the moment of torsion on each axle, upwards represents positive-torque, represents downwards Negative torque.

In car load driving process, the switching between each drive pattern, need through the pure electric Drive Mode in fourth gear position EV-4 carries out transition, performs closed procedure when each axle rotating speed enters the Guan Bi range of speeds of corresponding brake.This shift mode Utilize and the rotating speed of small machine EM1, big two motors of motor EM2 is controlled, it is to avoid use complicated shifting element Sliding Control Realize gearshift.In vehicle start to accelerator, the job order of each drive pattern is:

EV-1→EV-4→EV-2→EV-4→EV-3→EV-4。

Claims (2)

1. the pure electric transmission machanism of the many gears of double planet, including small machine (EM1), big motor (EM2), differential mechanism, its It is characterised by: also include the first single planetary row (PG1), the second single planetary row (PG2), the first brake (B1), second brake (B2), the 3rd brake (B3), the first reduction gearing (Z1), big retarding gear (Z2) and little reduction gearing (Z3), the first single file Star row (PG1) includes the first sun gear (S1), the first row star-wheel (P1), the first row carrier (PC1) and the first external toothing (R1), the Two single planetary rows (PG2) include the second sun gear (S2), the second planetary gear (P2), the second planet carrier (PC2) and the second external toothing (R2), the first single planetary row (PG1) and the second single planetary row (PG2) composition placed side by side compound planetary gearing, first is single The first row carrier (PC1) of planet row and second sun gear (S2) of the second single planetary row are connected to form the first axle, and first is single First external toothing (R1) of planet row and second planet carrier (PC2) of described second single planetary row are connected to form the second axle, Installing the first reduction gearing (Z1) on second axle, big retarding gear (Z2) is connected by rotating shaft with little reduction gearing (Z3), the One reduction gearing (Z1) is meshed with big retarding gear (Z2) and forms first order reducing gear train, little reduction gearing (Z3) and installation Differential mechanism final gear (Z4) on differential casing is meshed and forms second level reducing gear train；Differential mechanism passes through car load Semiaxis connects wheel, and the power of this actuating device is driven vehicle wheel rotation by differential mechanism output to car load semiaxis；First single planetary row The first sun gear (S1) be connected with the rotor of small machine (EM1) by the 3rd axle, the second external toothing of the second single planetary row (R2) it is connected with the rotor of big motor (EM2) by the 4th axle；One end of first brake (B1) is connected on the 3rd axle, and second One end of brake (B2) is connected on the 4th axle, and one end of the 3rd brake (B3) is connected on the first axle, the first brake (B1), the other end of second brake (B2) and the 3rd brake (B3) is each attached on gear box casing；4th axle is internal Hollow structure, the first axle is through the inside of the 4th axle.

The double planet the most as claimed in claim 1 pure electric transmission machanism of many gears, it is characterised in that: described small machine, double Rows of planetary gear mechanism, big motor sequentially coaxially arrange placement, first order reducing gear train, second level reducing gear train and differential Device is arranged between small machine and compound planetary gearing.